Gentoo Archives: gentoo-dev

From: "Michał Górny" <mgorny@g.o>
To: gentoo-dev@l.g.o
Cc: ulm@g.o
Subject: Re: [gentoo-dev] [PATCH 1/2] Introduce multibuild_merge_root() to merge interim installs.
Date: Sun, 24 Mar 2013 10:08:53
Message-Id: 20130324110931.3ef46f45@pomiocik.lan
In Reply to: Re: [gentoo-dev] [PATCH 1/2] Introduce multibuild_merge_root() to merge interim installs. by Ulrich Mueller
1 On Sun, 24 Mar 2013 08:47:41 +0100
2 Ulrich Mueller <ulm@g.o> wrote:
3
4 > >>>>> On Sat, 23 Mar 2013, Michał Górny wrote:
5 >
6 > >> > +multibuild_merge_root() {
7 > >> > + [...]
8 > >> > + if type -P lockf &>/dev/null; then
9 > >> > + # On BSD, we have 'lockf' wrapper.
10 > >> > + tar -C "${src}" -f - -c . \
11 > >> > + | lockf "${lockfile}" tar -x -f - -C "${dest}"
12 > >> > + else
13 > >> > + [...]
14 > >> > + cp -a -l -n "${src}"/. "${dest}"/
15 > >>
16 > >> You assume that cp is GNU, if there's no lockf. Is it guaranteed that
17 > >> this is true on all platforms?
18 >
19 > > They're all just assumptions. If it breaks somewhere, I'll improve
20 > > the function.
21 >
22 > Maybe explicitly testing for USERLAND would be less fragile? Or use
23 > tar everywhere?
24
25 I prefer something that can boom into face and let us know that it is
26 broken rather than silent, poor catch-all.
27
28 --
29 Best regards,
30 Michał Górny

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